﻿/**************Copyright(C)，2015-2026，QY Temp, Ltd.***************
  *@brief   : AES 加密实现函数
  *@notes   : 2016.11.11 CGQ 创建   
*******************************************************************************/
#include "aes-128.h"
#include "stdlib/R_stdlib.h"



const u8_t Sbox_MixColumns_1[256] = { // 正向 s-box
    0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 
    0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
    0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 
    0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
    0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 
    0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
    0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
    0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 
    0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 
    0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 
    0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 
    0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
    0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
    0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 
    0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 
    0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 
 };
 
const u8_t Sbox_MixColumns_2[256] = { // combined Xtimes2[Sbox[]]
    0xc6, 0xf8, 0xee, 0xf6, 0xff, 0xd6, 0xde, 0x91, 0x60, 0x02, 0xce, 0x56, 0xe7, 0xb5, 0x4d, 0xec, 
    0x8f, 0x1f, 0x89, 0xfa, 0xef, 0xb2, 0x8e, 0xfb, 0x41, 0xb3, 0x5f, 0x45, 0x23, 0x53, 0xe4, 0x9b, 
    0x75, 0xe1, 0x3d, 0x4c, 0x6c, 0x7e, 0xf5, 0x83, 0x68, 0x51, 0xd1, 0xf9, 0xe2, 0xab, 0x62, 0x2a, 
    0x08, 0x95, 0x46, 0x9d, 0x30, 0x37, 0x0a, 0x2f, 0x0e, 0x24, 0x1b, 0xdf, 0xcd, 0x4e, 0x7f, 0xea, 
    0x12, 0x1d, 0x58, 0x34, 0x36, 0xdc, 0xb4, 0x5b, 0xa4, 0x76, 0xb7, 0x7d, 0x52, 0xdd, 0x5e, 0x13, 
    0xa6, 0xb9, 0x00, 0xc1, 0x40, 0xe3, 0x79, 0xb6, 0xd4, 0x8d, 0x67, 0x72, 0x94, 0x98, 0xb0, 0x85, 
    0xbb, 0xc5, 0x4f, 0xed, 0x86, 0x9a, 0x66, 0x11, 0x8a, 0xe9, 0x04, 0xfe, 0xa0, 0x78, 0x25, 0x4b, 
    0xa2, 0x5d, 0x80, 0x05, 0x3f, 0x21, 0x70, 0xf1, 0x63, 0x77, 0xaf, 0x42, 0x20, 0xe5, 0xfd, 0xbf, 
    0x81, 0x18, 0x26, 0xc3, 0xbe, 0x35, 0x88, 0x2e, 0x93, 0x55, 0xfc, 0x7a, 0xc8, 0xba, 0x32, 0xe6, 
    0xc0, 0x19, 0x9e, 0xa3, 0x44, 0x54, 0x3b, 0x0b, 0x8c, 0xc7, 0x6b, 0x28, 0xa7, 0xbc, 0x16, 0xad, 
    0xdb, 0x64, 0x74, 0x14, 0x92, 0x0c, 0x48, 0xb8, 0x9f, 0xbd, 0x43, 0xc4, 0x39, 0x31, 0xd3, 0xf2, 
    0xd5, 0x8b, 0x6e, 0xda, 0x01, 0xb1, 0x9c, 0x49, 0xd8, 0xac, 0xf3, 0xcf, 0xca, 0xf4, 0x47, 0x10, 
    0x6f, 0xf0, 0x4a, 0x5c, 0x38, 0x57, 0x73, 0x97, 0xcb, 0xa1, 0xe8, 0x3e, 0x96, 0x61, 0x0d, 0x0f, 
    0xe0, 0x7c, 0x71, 0xcc, 0x90, 0x06, 0xf7, 0x1c, 0xc2, 0x6a, 0xae, 0x69, 0x17, 0x99, 0x3a, 0x27, 
    0xd9, 0xeb, 0x2b, 0x22, 0xd2, 0xa9, 0x07, 0x33, 0x2d, 0x3c, 0x15, 0xc9, 0x87, 0xaa, 0x50, 0xa5, 
    0x03, 0x59, 0x09, 0x1a, 0x65, 0xd7, 0x84, 0xd0, 0x82, 0x29, 0x5a, 0x1e, 0x7b, 0xa8, 0x6d, 0x2c 
};

const u8_t Sbox_MixColumns_3[] = { // combined Xtimes3[Sbox[]]
    0xa5, 0x84, 0x99, 0x8d, 0x0d, 0xbd, 0xb1, 0x54, 0x50, 0x03, 0xa9, 0x7d, 0x19, 0x62, 0xe6, 0x9a, 
    0x45, 0x9d, 0x40, 0x87, 0x15, 0xeb, 0xc9, 0x0b, 0xec, 0x67, 0xfd, 0xea, 0xbf, 0xf7, 0x96, 0x5b, 
    0xc2, 0x1c, 0xae, 0x6a, 0x5a, 0x41, 0x02, 0x4f, 0x5c, 0xf4, 0x34, 0x08, 0x93, 0x73, 0x53, 0x3f, 
    0x0c, 0x52, 0x65, 0x5e, 0x28, 0xa1, 0x0f, 0xb5, 0x09, 0x36, 0x9b, 0x3d, 0x26, 0x69, 0xcd, 0x9f, 
    0x1b, 0x9e, 0x74, 0x2e, 0x2d, 0xb2, 0xee, 0xfb, 0xf6, 0x4d, 0x61, 0xce, 0x7b, 0x3e, 0x71, 0x97, 
    0xf5, 0x68, 0x00, 0x2c, 0x60, 0x1f, 0xc8, 0xed, 0xbe, 0x46, 0xd9, 0x4b, 0xde, 0xd4, 0xe8, 0x4a, 
    0x6b, 0x2a, 0xe5, 0x16, 0xc5, 0xd7, 0x55, 0x94, 0xcf, 0x10, 0x06, 0x81, 0xf0, 0x44, 0xba, 0xe3, 
    0xf3, 0xfe, 0xc0, 0x8a, 0xad, 0xbc, 0x48, 0x04, 0xdf, 0xc1, 0x75, 0x63, 0x30, 0x1a, 0x0e, 0x6d, 
    0x4c, 0x14, 0x35, 0x2f, 0xe1, 0xa2, 0xcc, 0x39, 0x57, 0xf2, 0x82, 0x47, 0xac, 0xe7, 0x2b, 0x95, 
    0xa0, 0x98, 0xd1, 0x7f, 0x66, 0x7e, 0xab, 0x83, 0xca, 0x29, 0xd3, 0x3c, 0x79, 0xe2, 0x1d, 0x76, 
    0x3b, 0x56, 0x4e, 0x1e, 0xdb, 0x0a, 0x6c, 0xe4, 0x5d, 0x6e, 0xef, 0xa6, 0xa8, 0xa4, 0x37, 0x8b, 
    0x32, 0x43, 0x59, 0xb7, 0x8c, 0x64, 0xd2, 0xe0, 0xb4, 0xfa, 0x07, 0x25, 0xaf, 0x8e, 0xe9, 0x18, 
    0xd5, 0x88, 0x6f, 0x72, 0x24, 0xf1, 0xc7, 0x51, 0x23, 0x7c, 0x9c, 0x21, 0xdd, 0xdc, 0x86, 0x85, 
    0x90, 0x42, 0xc4, 0xaa, 0xd8, 0x05, 0x01, 0x12, 0xa3, 0x5f, 0xf9, 0xd0, 0x91, 0x58, 0x27, 0xb9, 
    0x38, 0x13, 0xb3, 0x33, 0xbb, 0x70, 0x89, 0xa7, 0xb6, 0x22, 0x92, 0x20, 0x49, 0xff, 0x78, 0x7a, 
    0x8f, 0xf8, 0x80, 0x17, 0xda, 0x31, 0xc6, 0xb8, 0xc3, 0xb0, 0x77, 0x11, 0xcb, 0xfc, 0xd6, 0x3a 
};
 
#if defined(AES_ECB_MODE) || defined(AES_CBC_MODE)
const u8_t MixColumns_9[256] = { 
    0x00, 0x09, 0x12, 0x1b, 0x24, 0x2d, 0x36, 0x3f, 0x48, 0x41, 0x5a, 0x53, 0x6c, 0x65, 0x7e, 0x77, 
    0x90, 0x99, 0x82, 0x8b, 0xb4, 0xbd, 0xa6, 0xaf, 0xd8, 0xd1, 0xca, 0xc3, 0xfc, 0xf5, 0xee, 0xe7,
    0x3b, 0x32, 0x29, 0x20, 0x1f, 0x16, 0x0d, 0x04, 0x73, 0x7a, 0x61, 0x68, 0x57, 0x5e, 0x45, 0x4c, 
    0xab, 0xa2, 0xb9, 0xb0, 0x8f, 0x86, 0x9d, 0x94, 0xe3, 0xea, 0xf1, 0xf8, 0xc7, 0xce, 0xd5, 0xdc, 
    0x76, 0x7f, 0x64, 0x6d, 0x52, 0x5b, 0x40, 0x49, 0x3e, 0x37, 0x2c, 0x25, 0x1a, 0x13, 0x08, 0x01,
    0xe6, 0xef, 0xf4, 0xfd, 0xc2, 0xcb, 0xd0, 0xd9, 0xae, 0xa7, 0xbc, 0xb5, 0x8a, 0x83, 0x98, 0x91, 
    0x4d, 0x44, 0x5f, 0x56, 0x69, 0x60, 0x7b, 0x72, 0x05, 0x0c, 0x17, 0x1e, 0x21, 0x28, 0x33, 0x3a, 
    0xdd, 0xd4, 0xcf, 0xc6, 0xf9, 0xf0, 0xeb, 0xe2, 0x95, 0x9c, 0x87, 0x8e, 0xb1, 0xb8, 0xa3, 0xaa,
    0xec, 0xe5, 0xfe, 0xf7, 0xc8, 0xc1, 0xda, 0xd3, 0xa4, 0xad, 0xb6, 0xbf, 0x80, 0x89, 0x92, 0x9b, 
    0x7c, 0x75, 0x6e, 0x67, 0x58, 0x51, 0x4a, 0x43, 0x34, 0x3d, 0x26, 0x2f, 0x10, 0x19, 0x02, 0x0b, 
    0xd7, 0xde, 0xc5, 0xcc, 0xf3, 0xfa, 0xe1, 0xe8, 0x9f, 0x96, 0x8d, 0x84, 0xbb, 0xb2, 0xa9, 0xa0,
    0x47, 0x4e, 0x55, 0x5c, 0x63, 0x6a, 0x71, 0x78, 0x0f, 0x06, 0x1d, 0x14, 0x2b, 0x22, 0x39, 0x30, 
    0x9a, 0x93, 0x88, 0x81, 0xbe, 0xb7, 0xac, 0xa5, 0xd2, 0xdb, 0xc0, 0xc9, 0xf6, 0xff, 0xe4, 0xed, 
    0x0a, 0x03, 0x18, 0x11, 0x2e, 0x27, 0x3c, 0x35, 0x42, 0x4b, 0x50, 0x59, 0x66, 0x6f, 0x74, 0x7d,
    0xa1, 0xa8, 0xb3, 0xba, 0x85, 0x8c, 0x97, 0x9e, 0xe9, 0xe0, 0xfb, 0xf2, 0xcd, 0xc4, 0xdf, 0xd6, 
    0x31, 0x38, 0x23, 0x2a, 0x15, 0x1c, 0x07, 0x0e, 0x79, 0x70, 0x6b, 0x62, 0x5d, 0x54, 0x4f, 0x46 
};
 
const u8_t MixColumns_B[256] = { 
    0x00, 0x0b, 0x16, 0x1d, 0x2c, 0x27, 0x3a, 0x31, 0x58, 0x53, 0x4e, 0x45, 0x74, 0x7f, 0x62, 0x69, 
    0xb0, 0xbb, 0xa6, 0xad, 0x9c, 0x97, 0x8a, 0x81, 0xe8, 0xe3, 0xfe, 0xf5, 0xc4, 0xcf, 0xd2, 0xd9,
    0x7b, 0x70, 0x6d, 0x66, 0x57, 0x5c, 0x41, 0x4a, 0x23, 0x28, 0x35, 0x3e, 0x0f, 0x04, 0x19, 0x12, 
    0xcb, 0xc0, 0xdd, 0xd6, 0xe7, 0xec, 0xf1, 0xfa, 0x93, 0x98, 0x85, 0x8e, 0xbf, 0xb4, 0xa9, 0xa2, 
    0xf6, 0xfd, 0xe0, 0xeb, 0xda, 0xd1, 0xcc, 0xc7, 0xae, 0xa5, 0xb8, 0xb3, 0x82, 0x89, 0x94, 0x9f,
    0x46, 0x4d, 0x50, 0x5b, 0x6a, 0x61, 0x7c, 0x77, 0x1e, 0x15, 0x08, 0x03, 0x32, 0x39, 0x24, 0x2f, 
    0x8d, 0x86, 0x9b, 0x90, 0xa1, 0xaa, 0xb7, 0xbc, 0xd5, 0xde, 0xc3, 0xc8, 0xf9, 0xf2, 0xef, 0xe4, 
    0x3d, 0x36, 0x2b, 0x20, 0x11, 0x1a, 0x07, 0x0c, 0x65, 0x6e, 0x73, 0x78, 0x49, 0x42, 0x5f, 0x54,
    0xf7, 0xfc, 0xe1, 0xea, 0xdb, 0xd0, 0xcd, 0xc6, 0xaf, 0xa4, 0xb9, 0xb2, 0x83, 0x88, 0x95, 0x9e, 
    0x47, 0x4c, 0x51, 0x5a, 0x6b, 0x60, 0x7d, 0x76, 0x1f, 0x14, 0x09, 0x02, 0x33, 0x38, 0x25, 0x2e, 
    0x8c, 0x87, 0x9a, 0x91, 0xa0, 0xab, 0xb6, 0xbd, 0xd4, 0xdf, 0xc2, 0xc9, 0xf8, 0xf3, 0xee, 0xe5,
    0x3c, 0x37, 0x2a, 0x21, 0x10, 0x1b, 0x06, 0x0d, 0x64, 0x6f, 0x72, 0x79, 0x48, 0x43, 0x5e, 0x55, 
    0x01, 0x0a, 0x17, 0x1c, 0x2d, 0x26, 0x3b, 0x30, 0x59, 0x52, 0x4f, 0x44, 0x75, 0x7e, 0x63, 0x68, 
    0xb1, 0xba, 0xa7, 0xac, 0x9d, 0x96, 0x8b, 0x80, 0xe9, 0xe2, 0xff, 0xf4, 0xc5, 0xce, 0xd3, 0xd8,
    0x7a, 0x71, 0x6c, 0x67, 0x56, 0x5d, 0x40, 0x4b, 0x22, 0x29, 0x34, 0x3f, 0x0e, 0x05, 0x18, 0x13, 
    0xca, 0xc1, 0xdc, 0xd7, 0xe6, 0xed, 0xf0, 0xfb, 0x92, 0x99, 0x84, 0x8f, 0xbe, 0xb5, 0xa8, 0xa3 
};
 
const u8_t MixColumns_D[256] = { 
    0x00, 0x0d, 0x1a, 0x17, 0x34, 0x39, 0x2e, 0x23, 0x68, 0x65, 0x72, 0x7f, 0x5c, 0x51, 0x46, 0x4b, 
    0xd0, 0xdd, 0xca, 0xc7, 0xe4, 0xe9, 0xfe, 0xf3, 0xb8, 0xb5, 0xa2, 0xaf, 0x8c, 0x81, 0x96, 0x9b,
    0xbb, 0xb6, 0xa1, 0xac, 0x8f, 0x82, 0x95, 0x98, 0xd3, 0xde, 0xc9, 0xc4, 0xe7, 0xea, 0xfd, 0xf0, 
    0x6b, 0x66, 0x71, 0x7c, 0x5f, 0x52, 0x45, 0x48, 0x03, 0x0e, 0x19, 0x14, 0x37, 0x3a, 0x2d, 0x20, 
    0x6d, 0x60, 0x77, 0x7a, 0x59, 0x54, 0x43, 0x4e, 0x05, 0x08, 0x1f, 0x12, 0x31, 0x3c, 0x2b, 0x26,
    0xbd, 0xb0, 0xa7, 0xaa, 0x89, 0x84, 0x93, 0x9e, 0xd5, 0xd8, 0xcf, 0xc2, 0xe1, 0xec, 0xfb, 0xf6, 
    0xd6, 0xdb, 0xcc, 0xc1, 0xe2, 0xef, 0xf8, 0xf5, 0xbe, 0xb3, 0xa4, 0xa9, 0x8a, 0x87, 0x90, 0x9d, 
    0x06, 0x0b, 0x1c, 0x11, 0x32, 0x3f, 0x28, 0x25, 0x6e, 0x63, 0x74, 0x79, 0x5a, 0x57, 0x40, 0x4d,
    0xda, 0xd7, 0xc0, 0xcd, 0xee, 0xe3, 0xf4, 0xf9, 0xb2, 0xbf, 0xa8, 0xa5, 0x86, 0x8b, 0x9c, 0x91, 
    0x0a, 0x07, 0x10, 0x1d, 0x3e, 0x33, 0x24, 0x29, 0x62, 0x6f, 0x78, 0x75, 0x56, 0x5b, 0x4c, 0x41, 
    0x61, 0x6c, 0x7b, 0x76, 0x55, 0x58, 0x4f, 0x42, 0x09, 0x04, 0x13, 0x1e, 0x3d, 0x30, 0x27, 0x2a,
    0xb1, 0xbc, 0xab, 0xa6, 0x85, 0x88, 0x9f, 0x92, 0xd9, 0xd4, 0xc3, 0xce, 0xed, 0xe0, 0xf7, 0xfa, 
    0xb7, 0xba, 0xad, 0xa0, 0x83, 0x8e, 0x99, 0x94, 0xdf, 0xd2, 0xc5, 0xc8, 0xeb, 0xe6, 0xf1, 0xfc, 
    0x67, 0x6a, 0x7d, 0x70, 0x53, 0x5e, 0x49, 0x44, 0x0f, 0x02, 0x15, 0x18, 0x3b, 0x36, 0x21, 0x2c,
    0x0c, 0x01, 0x16, 0x1b, 0x38, 0x35, 0x22, 0x2f, 0x64, 0x69, 0x7e, 0x73, 0x50, 0x5d, 0x4a, 0x47, 
    0xdc, 0xd1, 0xc6, 0xcb, 0xe8, 0xe5, 0xf2, 0xff, 0xb4, 0xb9, 0xae, 0xa3, 0x80, 0x8d, 0x9a, 0x97 
};
 
const u8_t MixColumns_E[256] = { 
    0x00, 0x0e, 0x1c, 0x12, 0x38, 0x36, 0x24, 0x2a, 0x70, 0x7e, 0x6c, 0x62, 0x48, 0x46, 0x54, 0x5a, 
    0xe0, 0xee, 0xfc, 0xf2, 0xd8, 0xd6, 0xc4, 0xca, 0x90, 0x9e, 0x8c, 0x82, 0xa8, 0xa6, 0xb4, 0xba,
    0xdb, 0xd5, 0xc7, 0xc9, 0xe3, 0xed, 0xff, 0xf1, 0xab, 0xa5, 0xb7, 0xb9, 0x93, 0x9d, 0x8f, 0x81, 
    0x3b, 0x35, 0x27, 0x29, 0x03, 0x0d, 0x1f, 0x11, 0x4b, 0x45, 0x57, 0x59, 0x73, 0x7d, 0x6f, 0x61, 
    0xad, 0xa3, 0xb1, 0xbf, 0x95, 0x9b, 0x89, 0x87, 0xdd, 0xd3, 0xc1, 0xcf, 0xe5, 0xeb, 0xf9, 0xf7,
    0x4d, 0x43, 0x51, 0x5f, 0x75, 0x7b, 0x69, 0x67, 0x3d, 0x33, 0x21, 0x2f, 0x05, 0x0b, 0x19, 0x17, 
    0x76, 0x78, 0x6a, 0x64, 0x4e, 0x40, 0x52, 0x5c, 0x06, 0x08, 0x1a, 0x14, 0x3e, 0x30, 0x22, 0x2c, 
    0x96, 0x98, 0x8a, 0x84, 0xae, 0xa0, 0xb2, 0xbc, 0xe6, 0xe8, 0xfa, 0xf4, 0xde, 0xd0, 0xc2, 0xcc,
    0x41, 0x4f, 0x5d, 0x53, 0x79, 0x77, 0x65, 0x6b, 0x31, 0x3f, 0x2d, 0x23, 0x09, 0x07, 0x15, 0x1b, 
    0xa1, 0xaf, 0xbd, 0xb3, 0x99, 0x97, 0x85, 0x8b, 0xd1, 0xdf, 0xcd, 0xc3, 0xe9, 0xe7, 0xf5, 0xfb, 
    0x9a, 0x94, 0x86, 0x88, 0xa2, 0xac, 0xbe, 0xb0, 0xea, 0xe4, 0xf6, 0xf8, 0xd2, 0xdc, 0xce, 0xc0,
    0x7a, 0x74, 0x66, 0x68, 0x42, 0x4c, 0x5e, 0x50, 0x0a, 0x04, 0x16, 0x18, 0x32, 0x3c, 0x2e, 0x20, 
    0xec, 0xe2, 0xf0, 0xfe, 0xd4, 0xda, 0xc8, 0xc6, 0x9c, 0x92, 0x80, 0x8e, 0xa4, 0xaa, 0xb8, 0xb6, 
    0x0c, 0x02, 0x10, 0x1e, 0x34, 0x3a, 0x28, 0x26, 0x7c, 0x72, 0x60, 0x6e, 0x44, 0x4a, 0x58, 0x56,
    0x37, 0x39, 0x2b, 0x25, 0x0f, 0x01, 0x13, 0x1d, 0x47, 0x49, 0x5b, 0x55, 0x7f, 0x71, 0x63, 0x6d, 
    0xd7, 0xd9, 0xcb, 0xc5, 0xef, 0xe1, 0xf3, 0xfd, 0xa7, 0xa9, 0xbb, 0xb5, 0x9f, 0x91, 0x83, 0x8d 
};

const u8_t InvSbox[256] = { // 逆向 s-box
    0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 
    0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
    0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 
    0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 
    0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 
    0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 
    0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
    0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 
    0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 
    0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 
    0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 
    0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
    0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 
    0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 
    0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 
    0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d 
};
#endif
static void SubShift(u8_t *buffer) 
{
    u8_t val;
 
    // just substitute row 0
    buffer[0]   = Sbox_MixColumns_1[buffer[0]];
    buffer[4]   = Sbox_MixColumns_1[buffer[4]];
    buffer[8]   = Sbox_MixColumns_1[buffer[8]];
    buffer[12]  = Sbox_MixColumns_1[buffer[12]];
 
    // rotate row 1
    val = Sbox_MixColumns_1[buffer[1]];
    buffer[1]   = Sbox_MixColumns_1[buffer[5]];
    buffer[5]   = Sbox_MixColumns_1[buffer[9]];
    buffer[9]   = Sbox_MixColumns_1[buffer[13]];
    buffer[13]  = val;
 
    // rotate row 2
    val         = Sbox_MixColumns_1[buffer[2]];
    buffer[2]   = Sbox_MixColumns_1[buffer[10]];
    buffer[10]  = val;
    val         = Sbox_MixColumns_1[buffer[6]];
    buffer[6]   = Sbox_MixColumns_1[buffer[14]];
    buffer[14]  = val;
 
    // rotate row 3
    val         = Sbox_MixColumns_1[buffer[15]];
    buffer[15]  = Sbox_MixColumns_1[buffer[11]];
    buffer[11]  = Sbox_MixColumns_1[buffer[7]];
    buffer[7]   = Sbox_MixColumns_1[buffer[3]];
    buffer[3]   = val;
}
 
// recombine and mix each row in a column
static void SubShiftMix(u8_t *buffer) 
{
    u8_t invBuffer[AES_BLOCK_SIZE];
    /*  [02, 03, 01, 01]
        [01, 02, 03, 01]
        [01, 01, 02, 03]
        [03, 01, 01, 02]*/
    // mixing column 0 
    invBuffer[0] = Sbox_MixColumns_2[buffer[0]] ^ Sbox_MixColumns_3[buffer[5]] ^ Sbox_MixColumns_1[buffer[10]] ^ Sbox_MixColumns_1[buffer[15]];
    invBuffer[1] = Sbox_MixColumns_1[buffer[0]] ^ Sbox_MixColumns_2[buffer[5]] ^ Sbox_MixColumns_3[buffer[10]] ^ Sbox_MixColumns_1[buffer[15]];
    invBuffer[2] = Sbox_MixColumns_1[buffer[0]] ^ Sbox_MixColumns_1[buffer[5]] ^ Sbox_MixColumns_2[buffer[10]] ^ Sbox_MixColumns_3[buffer[15]];
    invBuffer[3] = Sbox_MixColumns_3[buffer[0]] ^ Sbox_MixColumns_1[buffer[5]] ^ Sbox_MixColumns_1[buffer[10]] ^ Sbox_MixColumns_2[buffer[15]];
 
    // mixing column 1
    invBuffer[4] = Sbox_MixColumns_2[buffer[4]] ^ Sbox_MixColumns_3[buffer[9]] ^ Sbox_MixColumns_1[buffer[14]] ^ Sbox_MixColumns_1[buffer[3]];
    invBuffer[5] = Sbox_MixColumns_1[buffer[4]] ^ Sbox_MixColumns_2[buffer[9]] ^ Sbox_MixColumns_3[buffer[14]] ^ Sbox_MixColumns_1[buffer[3]];
    invBuffer[6] = Sbox_MixColumns_1[buffer[4]] ^ Sbox_MixColumns_1[buffer[9]] ^ Sbox_MixColumns_2[buffer[14]] ^ Sbox_MixColumns_3[buffer[3]];
    invBuffer[7] = Sbox_MixColumns_3[buffer[4]] ^ Sbox_MixColumns_1[buffer[9]] ^ Sbox_MixColumns_1[buffer[14]] ^ Sbox_MixColumns_2[buffer[3]];
 
    // mixing column 2
    invBuffer[8] = Sbox_MixColumns_2[buffer[8]] ^ Sbox_MixColumns_3[buffer[13]] ^ Sbox_MixColumns_1[buffer[2]] ^ Sbox_MixColumns_1[buffer[7]];
    invBuffer[9] = Sbox_MixColumns_1[buffer[8]] ^ Sbox_MixColumns_2[buffer[13]] ^ Sbox_MixColumns_3[buffer[2]] ^ Sbox_MixColumns_1[buffer[7]];
    invBuffer[10] = Sbox_MixColumns_1[buffer[8]] ^ Sbox_MixColumns_1[buffer[13]] ^ Sbox_MixColumns_2[buffer[2]]^ Sbox_MixColumns_3[buffer[7]];
    invBuffer[11] = Sbox_MixColumns_3[buffer[8]] ^ Sbox_MixColumns_1[buffer[13]] ^ Sbox_MixColumns_1[buffer[2]]^ Sbox_MixColumns_2[buffer[7]];
 
    // mixing column 3
    invBuffer[12] = Sbox_MixColumns_2[buffer[12]] ^ Sbox_MixColumns_3[buffer[1]] ^ Sbox_MixColumns_1[buffer[6]] ^ Sbox_MixColumns_1[buffer[11]];
    invBuffer[13] = Sbox_MixColumns_1[buffer[12]] ^ Sbox_MixColumns_2[buffer[1]] ^ Sbox_MixColumns_3[buffer[6]] ^ Sbox_MixColumns_1[buffer[11]];
    invBuffer[14] = Sbox_MixColumns_1[buffer[12]] ^ Sbox_MixColumns_1[buffer[1]] ^ Sbox_MixColumns_2[buffer[6]] ^ Sbox_MixColumns_3[buffer[11]];
    invBuffer[15] = Sbox_MixColumns_3[buffer[12]] ^ Sbox_MixColumns_1[buffer[1]] ^ Sbox_MixColumns_1[buffer[6]] ^ Sbox_MixColumns_2[buffer[11]];
 
    r_memcpy(buffer, invBuffer, AES_BLOCK_SIZE);
 
}

 #if defined(AES_ECB_MODE)|| defined(AES_CBC_MODE)
 static void InvShiftSub(u8_t *buffer) 
 {
     u8_t val;
  
     // restore row 0
     buffer[0]   = InvSbox[buffer[0]];
     buffer[4]   = InvSbox[buffer[4]];
     buffer[8]   = InvSbox[buffer[8]];
     buffer[12]  = InvSbox[buffer[12]];
  
     // restore row 1
     val         = InvSbox[buffer[13]];
     buffer[13]  = InvSbox[buffer[9]];
     buffer[9]   = InvSbox[buffer[5]];
     buffer[5]   = InvSbox[buffer[1]];
     buffer[1]   = val;
  
     // restore row 2
     val         = InvSbox[buffer[2]];
     buffer[2]   = InvSbox[buffer[10]];
     buffer[10]  = val;
     val         = InvSbox[buffer[6]];
     buffer[6]   = InvSbox[buffer[14]];
     buffer[14]  = val;
  
     // restore row 3
     val         = InvSbox[buffer[3]];
     buffer[3]   = InvSbox[buffer[7]];
     buffer[7]   = InvSbox[buffer[11]];
     buffer[11]  = InvSbox[buffer[15]];
     buffer[15]  = val;
 }
// restore and un-mix each row in a column
static void InvMixShitfSub(u8_t *buffer) 
{
    u8_t invBuffer[AES_BLOCK_SIZE];
    int i;
    /*  [0E, 0B, 0D, 09]
        [09, 0E, 0B, 0D]
        [0D, 09, 0E, 0B]
        [0B, 0D, 09, 0E]*/
    // restore column 0
    invBuffer[0]  = MixColumns_E[buffer[0]] ^ MixColumns_B[buffer[1]] ^ MixColumns_D[buffer[2]] ^ MixColumns_9[buffer[3]];
    invBuffer[5]  = MixColumns_9[buffer[0]] ^ MixColumns_E[buffer[1]] ^ MixColumns_B[buffer[2]] ^ MixColumns_D[buffer[3]];
    invBuffer[10] = MixColumns_D[buffer[0]] ^ MixColumns_9[buffer[1]] ^ MixColumns_E[buffer[2]] ^ MixColumns_B[buffer[3]];
    invBuffer[15] = MixColumns_B[buffer[0]] ^ MixColumns_D[buffer[1]] ^ MixColumns_9[buffer[2]] ^ MixColumns_E[buffer[3]];
 
    // restore column 1
    invBuffer[4]  = MixColumns_E[buffer[4]] ^ MixColumns_B[buffer[5]] ^ MixColumns_D[buffer[6]] ^ MixColumns_9[buffer[7]];
    invBuffer[9]  = MixColumns_9[buffer[4]] ^ MixColumns_E[buffer[5]] ^ MixColumns_B[buffer[6]] ^ MixColumns_D[buffer[7]];
    invBuffer[14] = MixColumns_D[buffer[4]] ^ MixColumns_9[buffer[5]] ^ MixColumns_E[buffer[6]] ^ MixColumns_B[buffer[7]];
    invBuffer[3]  = MixColumns_B[buffer[4]] ^ MixColumns_D[buffer[5]] ^ MixColumns_9[buffer[6]] ^ MixColumns_E[buffer[7]];
 
    // restore column 2
    invBuffer[8]  = MixColumns_E[buffer[8]] ^ MixColumns_B[buffer[9]] ^ MixColumns_D[buffer[10]] ^ MixColumns_9[buffer[11]];
    invBuffer[13] = MixColumns_9[buffer[8]] ^ MixColumns_E[buffer[9]] ^ MixColumns_B[buffer[10]] ^ MixColumns_D[buffer[11]];
    invBuffer[2]  = MixColumns_D[buffer[8]] ^ MixColumns_9[buffer[9]] ^ MixColumns_E[buffer[10]] ^ MixColumns_B[buffer[11]];
    invBuffer[7]  = MixColumns_B[buffer[8]] ^ MixColumns_D[buffer[9]] ^ MixColumns_9[buffer[10]] ^ MixColumns_E[buffer[11]];
 
    // restore column 3
    invBuffer[12] = MixColumns_E[buffer[12]] ^ MixColumns_B[buffer[13]] ^ MixColumns_D[buffer[14]] ^ MixColumns_9[buffer[15]];
    invBuffer[1]  = MixColumns_9[buffer[12]] ^ MixColumns_E[buffer[13]] ^ MixColumns_B[buffer[14]] ^ MixColumns_D[buffer[15]];
    invBuffer[6]  = MixColumns_D[buffer[12]] ^ MixColumns_9[buffer[13]] ^ MixColumns_E[buffer[14]] ^ MixColumns_B[buffer[15]];
    invBuffer[11] = MixColumns_B[buffer[12]] ^ MixColumns_D[buffer[13]] ^ MixColumns_9[buffer[14]] ^ MixColumns_E[buffer[15]];
 
    for (i = 0; i < AES_BLOCK_SIZE; i++)
    {
        buffer[i] = InvSbox[invBuffer[i]];
    }
}
#endif 
static void ADDRoundKey(u32_t *buffer, u32_t *Key) //key 为扩展密钥,使用int 一次四个字节
{
   *buffer++ ^= *Key++;
   *buffer++ ^= *Key++;
   *buffer++ ^= *Key++;
   *buffer   ^= *Key;
}

static void CipherKeySet(u8_t *cipherKey, u8_t *extendKey)
{
    const u8_t Rcon[] = {0x01, 0x02, 0x04, 0x01, 0x08, 0x10, 0x20, 0x40, 0x1B, 0x36};
    u32_t *pKey, *pextendKey;
    u32_t i;
    u8_t *p;

    r_memcpy(extendKey, cipherKey, AES_BLOCK_SIZE);
    pextendKey = (u32_t*)extendKey;
    pKey = pextendKey + 3;
    
    for (i = 0; i < AES_ROUND; i++)
    {
        *(++pKey) = *pKey;
        *pKey = (*pKey<<24)|(*pKey>>8);
        p = (u8_t*)pKey;
        *p++ = Sbox_MixColumns_1[*p]^Rcon[i];
        *p++ = Sbox_MixColumns_1[*p];
        *p++ = Sbox_MixColumns_1[*p];
        *p++ = Sbox_MixColumns_1[*p];
        
        *pKey   = *pextendKey++ ^ *pKey;
        *++pKey = *pextendKey++ ^ *pKey;
        *++pKey = *pextendKey++ ^ *pKey;
        *++pKey = *pextendKey++ ^ *pKey;
    }
}

static void AES_Encrypt(AESKey_t *extKey, u8_t * buf)
{
    int i = AES_ROUND;
    
    while (--i)
    {
        ADDRoundKey((u32_t*)buf, (u32_t*)extKey++);
        SubShiftMix(buf);
    }
    ADDRoundKey((u32_t*)buf, (u32_t*)extKey++);
    SubShift(buf);
    ADDRoundKey((u32_t*)buf, (u32_t*)extKey);
}

static void AES_Decrypt(AESKey_t *extKey, u8_t * buf)
{
    int i = AES_ROUND;

    extKey += AES_ROUND;
    ADDRoundKey((u32_t*)buf, (u32_t*)extKey--);
    InvShiftSub(buf);
    ADDRoundKey((u32_t*)buf, (u32_t*)extKey--);
        
    while (--i)
    {
        InvMixShitfSub(buf);
        ADDRoundKey((u32_t*)buf, (u32_t*)extKey--);
    }
}
#if defined(AES_OFB_MODE)|| defined(AES_CFB_MODE)
static void DataOR(void *trg, void *src, int count) //数据异或
{
#define UNALIGNED(X, Y)                                 \
                        (((u32_t)X & (sizeof(u32_t) - 1))   \
                        |((u32_t)Y & (sizeof(u32_t) - 1)))
#define BIGBLOCKSIZE    (sizeof(u32_t) << 2)
#define LITTLEBLOCKSIZE (sizeof(u32_t))
#define TOO_SMALL(LEN)  ((LEN) < BIGBLOCKSIZE)

    if (trg != src)    //目标与源不是同一位置
    {
        u8_t *dst_ptr = (u8_t*)trg;
        u8_t *src_ptr = (u8_t*)src;

        /* If the size is small, or either SRC or DST is unaligned,
        then punt into the byte copy loop.  This should be rare. */
        if (!TOO_SMALL(count) && !UNALIGNED(src_ptr, dst_ptr))
        {
            u32_t *aligned_dst = (u32_t *)trg;
            u32_t *aligned_src = (u32_t *)src;

            /* Copy 4X long words at a time if possible. */
            while (count >= BIGBLOCKSIZE)
            {
                *aligned_dst++ ^= *aligned_src++;
                *aligned_dst++ ^= *aligned_src++;
                *aligned_dst++ ^= *aligned_src++;
                *aligned_dst++ ^= *aligned_src++;
                count -= BIGBLOCKSIZE;
            }

            /* Copy one long word at a time if possible. */
            while (count >= LITTLEBLOCKSIZE)
            {
                *aligned_dst++ ^= *aligned_src++;
                count -= LITTLEBLOCKSIZE;
            }

            /* Pick up any residual with a byte copier. */
            dst_ptr = (u8_t *)aligned_dst;
            src_ptr = (u8_t *)aligned_src;
        }

        while (count--)
        {
            *dst_ptr++ ^= *src_ptr++;
        }
    }

#undef UNALIGNED
#undef BIGBLOCKSIZE
#undef LITTLEBLOCKSIZE
#undef TOO_SMALL
}
#endif

#ifdef AES_ECB_MODE
//Electronic Codebook Book 数组溢出风险
static u8_t *AES_Encrypt_ECB(Cipher_t *cipher, u8_t * input, int *lenght)
{
    int len;
    u8_t *pDest = input;

    for (len = *lenght; len > 0; len -= AES_BLOCK_SIZE)
    {
        if (len < AES_BLOCK_SIZE)
        {
            r_memset(pDest+len, 0, AES_BLOCK_SIZE - len);
            len = AES_BLOCK_SIZE;
        }
        AES_Encrypt((AESKey_t *)cipher->extendKey, pDest);
        pDest += AES_BLOCK_SIZE;
    }
    
    *lenght = pDest - input;
    return input;
}

//Electronic Codebook Book 数组溢出风险
u8_t *AES_Decrypt_ECB(Cipher_t *cipher, u8_t * input, int *lenght)
{
    int len = *lenght;
    u8_t *pDest = input;

    while (len > AES_BLOCK_SIZE)
    {
        AES_Decrypt((AESKey_t *)cipher->extendKey, pDest);
        pDest += AES_BLOCK_SIZE;
        len -= AES_BLOCK_SIZE;
    }
    
    return input;
}
#endif

#ifdef AES_CBC_MODE
//Cipher Block Chaining  数组溢出风险
u8_t *AES_Encrypt_CBC(Cipher_t *cipher, u8_t * input, int *lenght)
{
    int len;
    u8_t *pDest = input;
    u32_t *pIV = (u32_t*)cipher->zeroIV;

    for (len = *lenght; len > 0; len -= AES_BLOCK_SIZE)
    {
        ADDRoundKey((u32_t*)pDest, pIV);
        if (len < AES_BLOCK_SIZE)
        {
            r_memset(pDest+len, 0, AES_BLOCK_SIZE - len);
            len = AES_BLOCK_SIZE;
        }
        AES_Encrypt((AESKey_t *)cipher->extendKey, pDest);
        pIV = (u32_t*)pDest;
        pDest += AES_BLOCK_SIZE;
    }
    
    *lenght = pDest - input;
    return input;
}

//Cipher Block Chaining 
u8_t *AES_Decrypt_CBC(Cipher_t *cipher, u8_t * input, int *lenght)
{
    int len = *lenght;
    u8_t *pDest = input+ len - AES_BLOCK_SIZE;
    u32_t *pIV = (u32_t*)(pDest - AES_BLOCK_SIZE);

    while (len > 0)
    {
        AES_Decrypt((AESKey_t *)cipher->extendKey, pDest);
        len -= AES_BLOCK_SIZE;
        
        if (len < AES_BLOCK_SIZE)
        {
            pIV = (u32_t*)cipher->zeroIV;
        }
        ADDRoundKey((u32_t*)pDest, pIV);
        pIV   -= AES_BLOCK_SIZE;
        pDest -= AES_BLOCK_SIZE; 
    }
    
    return input;
}
#endif
#ifdef AES_CFB_MODE
//Cipher FeedBack
u8_t *AES_Encrypt_CFB(Cipher_t *cipher, u8_t * input, int *lenght)
{
    int i, size;
    u8_t ciphertext[AES_BLOCK_SIZE];
    u8_t *pDest = input;

    r_memcpy(ciphertext, cipher->zeroIV, AES_BLOCK_SIZE);
    
    for (i = *lenght; i > 0; i -= size)
    {
        size = i < AES_BLOCK_SIZE ? i : AES_BLOCK_SIZE;
        AES_Encrypt((AESKey_t *)cipher->extendKey, ciphertext);
        DataOR(pDest, ciphertext, size);
        r_memcpy(ciphertext, pDest, AES_BLOCK_SIZE);
        pDest += AES_BLOCK_SIZE;
    }
    
    return input;
}
#endif
#ifdef AES_OFB_MODE
//Output FeedBack (OFB)
u8_t *AES_Encrypt_OFB(Cipher_t *cipher, u8_t * input, int *lenght)
{
    int i, size;
    u8_t ciphertext[AES_BLOCK_SIZE];
    u8_t *pDest = input;
    
    r_memcpy(ciphertext, cipher->zeroIV, AES_BLOCK_SIZE);
    
    for (i = *lenght; i > 0; i -= size)
    {
        size = i < AES_BLOCK_SIZE ? i : AES_BLOCK_SIZE;
        AES_Encrypt((AESKey_t *)cipher->extendKey, ciphertext);
        DataOR(pDest, ciphertext, size);
        pDest += AES_BLOCK_SIZE;
    }
    
    return input;
}
#endif
void Cipher_init(u8_t *cipherKey, u8_t *zeroIV, AESMode_e mode, Cipher_t *cipher )
{
    if (zeroIV != null)
    {
        r_memcpy(cipher->zeroIV, zeroIV, AES_BLOCK_SIZE);
    }
    else
    {
        r_memset(cipher->zeroIV, 0, AES_BLOCK_SIZE);
    }

    CipherKeySet(cipherKey, cipher->extendKey);

    switch (mode)
    {
#ifdef  AES_ECB_MODE
        case AES_ECB: 
            cipher->encrypt = AES_Encrypt_ECB;
            cipher->decrypt = AES_Decrypt_ECB;
            break;
#endif
#ifdef  AES_CBC_MODE
        case AES_CBC:
            cipher->encrypt = AES_Encrypt_CBC;
            cipher->decrypt = AES_Decrypt_CBC;
            break;
#endif
#ifdef  AES_CFB_MODE
        case AES_CFB:
            cipher->encrypt = AES_Encrypt_CFB;
            cipher->decrypt = AES_Encrypt_CFB;
            break;
#endif
#ifdef  AES_OFB_MODE
        case AES_OFB:
            cipher->encrypt = AES_Encrypt_OFB;
            cipher->decrypt = AES_Encrypt_OFB;
            break;
#endif           
        default :
            return;
    }
}


/******************************************************************************/

